iOS 27.2.1 (24B156) for iPhone 17 Pro iPhone 17 Pro

1 Choose a product
2 Choose a device
3 Choose a version
4 Download

✓ This firmware is signed. This means that you can restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.

Your download should begin shortly. If it does not, you can download it directly here:

Download (12 GiB)

Windows

  1. Install the latest version of Apple Devices from the Microsoft Store.
  2. Plug your iPhone 17 Pro in to your PC.
  3. Open Apple Devices, and navigate to your iPhone 17 Pro.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone18,1_27.2.1_24B156_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 17 Pro to reboot.

macOS

  1. Plug your iPhone 17 Pro in to your Mac.
  2. Navigate to your iPhone 17 Pro in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone18,1_27.2.1_24B156_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 17 Pro to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 17 Pro in to your PC.
  3. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  4. To perform a full erase restore, type idevicerestore -e iPhone18,1_27.2.1_24B156_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 17 Pro to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone18,1_27.2.1_24B156_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: f321bc82a35baf8bc38e46a5a0f751acd4f9e594. If it doesn't, you may need to redownload the file.

macOS

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 iPhone18,1_27.2.1_24B156_Restore.ipsw
  3. The output of the command should match the following checksum: f321bc82a35baf8bc38e46a5a0f751acd4f9e594. If it doesn't, you may need to redownload the file.

Linux

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 iPhone18,1_27.2.1_24B156_Restore.ipsw
  3. The output of the command should match the following checksum: f321bc82a35baf8bc38e46a5a0f751acd4f9e594. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum822d8b142d5baa94995676b43052e506b873e43615245d8f33e4e4fb243624b4
MD5suma90c62b5a6a79fd75b4e668d4eb82e68
SHA1sumf321bc82a35baf8bc38e46a5a0f751acd4f9e594
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

This update provides bug fixes and security updates for your iPhone.

For information on the security content of Apple software updates, please visit:

https://support.apple.com/100100

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